Placement Test TBAT BIO 2024

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Placement Test TBAT Bio 2024

TBAT Placement Test

This TBAT placement will provide students with the suggestion of whether they should enroll in the Intensive TBAT course of each subject knowledge before enrolling in the respective TBAT marathon course as part of their preparation for the Thai Biomedical Admissions Test (TBAT). As the official TBAT is an emerging test, this placement test makes use of the official exam blueprint and prior familiarity with tests from Chulalongkorn University Academic Testing Center to gauge students' readiness.

This TBAT placement has a test for all three primary branches of scientific knowledge: Physics, Chemistry, and Biology. Students may attempt one or more of the following:

1) TBAT Physics: 20 questions assorted from a range of 7 topics

2) TBAT Chemistry: 20 questions assorted from a range of 7 topics

3) TBAT Biology: 27 questions assorted from a range of 6 topics

Placement Test TBAT Bio 2024

TBAT Placement Test

This TBAT placement has a test for all three primary branches of scientific knowledge: Physics, Chemistry, and Biology. Students may attempt one or more of the following:

1) TBAT Physics: 20 questions assorted from a range of 7 topics

2) TBAT Chemistry: 20 questions assorted from a range of 7 topics

3) TBAT Biology: 27 questions assorted from a range of 6 topics

Question 1

The table shows the results of a study on the activity of a certain enzyme in Tubes 1-7, in which each tube contains the same amount of substrate that is not a limiting factor for the reaction. After the reaction proceeded for 1 hour, the maximum reaction rates and the temperatures of the test tubes were measured, as shown:

Given:

The sign - indicates no reaction occurs.

The sign + indicates a reaction occurs, with greater number of + signs showing greater level of reaction.

Which conclusion can be made from the results provided?

A) This enzyme is active between the temperature range of 25 - 50°C.

B) Inhibitor B is a non-competitive inhibitor.

C) The optimum pH for the enzyme reaction is 7.

D) The enzyme-catalyzed reaction is exothermic.

E) The optimum temperature for the reaction is 37°C.

Question 2

A student measured the sizes of cells A-D using a microscope with an eyepiece lens of 10x magnification, and then calculated the actual lengths of the cells and recorded the data. However, some of the data were missing, as shown in the table:

Note: The symbol ? represents a piece missing data.

Based on the results, which statement is CORRECT?

A) Cell A is the longest.

B) Cell B is the shortest.

C) Cell C is shorter than cell D.

D) The objective lens used to study cell B has a magnification of 40X.

E) The objective lens used to study cell D has a magnification of 10X.

Question 3

In a study on membrane transport, 3 artificial cells (1-3) with different cell membrane composition contain substance A, which is red. These were then immersed in a beaker under various conditions for 30 minutes. The changes to the intensity of the red color in the artificial cells was observed, as shown in the table:

Based on the results, if the artificial cell membrane is partially permeable, which statement is correct?

A) Substance A moves through the membrane of cell 1 by simple diffusion.

B) Substance A moves through the membrane of cell 2 by facilitated diffusion

C) Substance A moves through the membrane of cell 3 by facilitated diffusion and active transport.

D) Protein Y acts as a channel protein for substance A through the cell membrane.

E) If cell 2 is immersed in a solution of 10% A with ATP added, there would be no change to the final intensity of the red color.

Question 4

Which of the following molecules is not involved in both aerobic respiration and anaerobic respiration in muscles?

A) Glucose

B) Water

C) Carbon dioxide

D) Lactic acid

E) Ethanol

Question 5

Some fungi can reproduce by producing spores. The spores are produced by cell division from the mycelium, the small unit of fungi, which has a single set of chromosomes. Spores can grow into a new individual without any fertilization.

1 This process is one of the asexual reproductions.

2 The newly born individual will have a double set of chromosomes.

3 This reproduction requires both meiosis and mitosis.

Which statement correctly describes the fungi reproduction?

A) 1 only

B) 2 only

C) 3 only

D) 1 and 2 only

E) 1 and 3 only

Question 6

The first mRNA codon that specifies an initial amino acid is always:

A) TAC.

B) UAA.

C) UAG.

D) AUG.

E) UGA.

Question 7

What is the minimum number of those that must be heterozygous in each of the conditions?

Only U shows a recessive condition	Only R and U show a recessive condition
1	2

Only U shows a recessive condition	Only R and U show a recessive condition
2	2

Only U shows a recessive condition	Only R and U show a recessive condition
2	3

Only U shows a recessive condition	Only R and U show a recessive condition
3	3

Only U shows a recessive condition	Only R and U show a recessive condition
3	4

Question 8

The determination of fur color in rabbits is polyallelic, with each fur trait controlled by the alleles as follows:

The brown fur trait is controlled by the allele C.

The Himalayan fur trait is controlled by the allele C^h.

The chinchilla fur trait is controlled by the allele C^ch.

The albino trait is controlled by the allele c.

When purebred rabbits of each trait are crossed, the resulting offspring have the traits as shown in the table:

Which statement correctly describes the dominance of alleles controlling the fur color of rabbits?

A) Allele c dominates allele C^h.

B) Allele c dominates allele C^ch.

C) Allele C^ch dominates allele C^h.

D) Allele c dominates allele C^ch and allele C^h.

E) Allele C^h dominates allele c and allele C^ch.

Question 9

The diagram shows the general procedure for genetic engineering.

Which row is correct?

W	X	Y	Z
gene	restriction endonuclease	restriction endonuclease	ligase

W	X	Y	Z
gene	ligase	restriction endonuclease	restriction endonuclease

W	X	Y	Z
chromosome	restriction endonuclease	ligase	ligase

W	X	Y	Z
chromosome	ligase	ligase	restriction endonuclease

W	X	Y	Z
chromosome	restriction endonuclease	restriction endonuclease	ligase

Question 10

Which of the following events cannot lead to the emergence of a new species capable of further evolution?

A) The breeding between two species, resulting in fertile offspring with an increased number of chromosomes.

B) Geographic isolation, which leads to organisms evolving to adapt to the environment of each niche.

C) The breeding between species A with 64 chromosomes and species B with 62 chromosomes, resulting in infertile offspring with 63 chromosomes.

D) Mutation leading to changes in the behavior of an organism, resulting in reproductive isolation from the original species.

E) Abnormal meiotic cell division in an organism, resulting in new cells with a different ploidy, and the organism is still fertile.

Question 11

A survey of four endemic plant species revealed that each species has the following characteristics:

Should further research be conducted on the characteristics of the four plant species, which statement would be correct?

A) Plant species A does not have xylem and phloem, similarly to plant species D.

B) Plant species B has sporangia clusters under the leaves, similarly to plant species C.

C) Plant species C does not produce seeds, similarly to plant species A.

D) Plant species D has ovules inside the ovary, similarly to plant species B.

E) Plant species B and plant species C produce flowers as reproductive organs.

Question 12

Which of the following does not refer primarily to a relationship between members of different species?

A) Mutualism

B) Hibernation

C) Parasitism

D) Commensalism

E) Predation

Question 13

A population of sheep is in Hardy-Weinberg equilibrium. The allele for white wool (W) has an allele frequency of 0.19, and the allele for black wool (w) has an allele frequency of 0.81. What is the percentage of heterozygous individuals in the population?

A) 4%

B) 10%

C) 15%

D) 31%

E) 66%

Question 14

The atmosphere is made up of about 78% nitrogen. Nitrogen is very important to plant growth. The nitrogen in soil is often a limiting factor for plants, even though it is common in air. Which statement best describes why it is often limited in soil?

A) The nitrogen is quickly removed from the soil and tied up in plants.

B) The nitrogen is not being returned to the atmosphere quickly enough.

C) The nitrogen compounds are water soluble and quickly washed away.

D) The nitrogen-fixing bacteria fix nitrogen in the soil and water at a slow rate.

E) The denitrifying bacteria remove nitrogen from the soil too fast.

Question 15

Which of the following is the vascular tissue that transfers sugars from the leaves to other parts of the plant?

A) Phloem

B) Xylem

C) Parenchyma

D) Cambium

E) Pericycle

Question 16

The experiment compared the net CO₂ fixation rates of plants X and Y at various CO₂ concentrations in the air, as shown in the graph:

Which row correctly identifies the type of plants and explains the phenomenon affecting the net CO₂ fixation rate?

Plant X	Plant Y	Phenomenon occurring in plants
Rice	Sugarcane	At 50 ppm CO₂ in the air, plant X releases CO₂ from cellular respiration in a lower amount than CO₂ fixed by photosynthesis.

Plant X	Plant Y	Phenomenon occurring in plants
Rice	Sugarcane	At 250 ppm CO₂ in the air, plant X experiences more photorespiration than Plant Y does.

Plant X	Plant Y	Phenomenon occurring in plants
Rice	Sugarcane	At 650 ppm CO₂ in the air, plant X fixes carbon twice, resulting in a higher net CO₂ fixation rate than plant Y.

Plant X	Plant Y	Phenomenon occurring in plants
Rice	Sugarcane	At 750 ppm CO₂ in the air, plant Y has a lower CO₂ fixation rate than plant X does.

Plant X	Plant Y	Phenomenon occurring in plants
Rice	Sugarcane	At 1,000 ppm CO₂ in the air, plant Y releases CO₂ from cellular respiration in an amount equal to CO₂ fixed by photosynthesis.

Question 17

Which statement correctly describes the life cycle and reproduction of plants?

A) The male gametophyte is diploid.

B) Alternation of generations is not found in non-vascular plants.

C) Spores of flowering plants are gametes ready for fertilization.

D) Male and female parts are always found in the same plant.

E) Fertilized gametes develop into the seeds of fruits in flowering plants.

Question 18

A scientist mixes three biomolecules, carbohydrate, lipid, and protein, altogether in three test tubes and then adds one of the three enzymes, amylase, protease, and lipase, into each of the test tubes. Which of these experimental sets can be expected that the pH of the product(s) from digestion is lower than of the initial substrate after adding the digestive enzymes?

1 The mixture + amylase

2 The mixture + protease

3 The mixture + lipase

A) 2 only

B) 3 only

C) 1 and 2 only

D) 1 and 3 only

E) 2 and 3 only

Question 19

After an accident, a healthy man suffered an arterial wall dissection in his right thigh, resulting in severe blood loss, with his blood pressure measured at 90/50 mmHg.

Based on the data, which statement is correct?

A) The arterial wall dissection led to reduced oxygen delivery to the tissues in his right foot.

B) The body stimulated the conversion of prothrombin into thrombin, prompting the formation of protein clots in the dissected area.

C) The arterial wall dissection caused the valves within the blood vessels to function more actively to reduce the blood outflow.

D) Due to significant blood loss, arteries will dilate to increase blood flow to the tissues.

E) When blood pressure decreases, the parasympathetic system will accelerate the heartbeat, thereby increasing blood pumping.

Question 20

A snake was placed in a chamber with a constant flow of air. The temperature of the chamber varied between 30°C and 15°C. Apart from temperature and time, all other variables were kept constant.

The carbon dioxide concentrations in the air leaving the chamber are shown in the graph.

Which of the following statements is/are correct?

A) The respiration rate of the snake between 30°C and 15°C is inversely proportional to the environmental temperature.

B) The carbon dioxide could be detected by passing the air leaving the chamber through limewater.

C) The data demonstrates that the snake is only respiring aerobically.

D) Carbon concentration decreases by the increase of the respiration rate of the snake when the time passes by.

E) The snake uses less oxygen for respiration at 25°C than that at 20°C.

Question 21

The table presents the nitrogenous waste excretion of five animals.

Based on the table, which choice correctly summarizes all the data for a certain organism?

A) Hydra

B) Planaria

C) Earthworm

D) Butterfly

E) Dog

Question 22

A synapse is a junction between a presynaptic neuron and a postsynaptic neuron in which neuron communication takes place by chemicals called neurotransmitters. Statements below describe steps of a typical neurotransmission. Which of these are incorrect?

A) The neurotransmitters are packed into vesicles in the receptors.

B) The signals are transmitted across the synapse by diffusion.

C) The neurotransmitters are released when the signals reach the axon terminal.

D) The neurotransmitters are released as they are triggered by nerve impulses.

E) The signals do not trigger the postsynaptic neuron unless specific receptors are available.

Question 23

Which of the following statements correctly describe human hormones?

A) Adrenaline secreted by the hypothalamus increases heartbeat rates.

B) Estrogen secreted from the ovary regulates female secondary characteristics.

C) TSH secreted by anterior pituitary inhibits thyroxine production.

D) Antidiuretic hormone secreted by anterior pituitary regulates water level in blood.

E) Insulin secreted by the pancreas increases blood glucose level.

Question 24

Based on the picture, which row accurately describes the condition of each muscle group?

Biceps	Triceps	Flexors	Extensors
Contracted	Relaxed	Contracted	Relaxed

Biceps	Triceps	Flexors	Extensors
Contracted	Relaxed	Relaxed	Contracted

Biceps	Triceps	Flexors	Extensors
Relaxed	Contracted	Relaxed	Contracted

Biceps	Triceps	Flexors	Extensors
Relaxed	Contracted	Contracted	Relaxed

Biceps	Triceps	Flexors	Extensors
Contracted	Contracted	Contracted	Relaxed

Question 25

The diagram below illustrates the life cycle processes of a frog.

Based on the diagram, evaluate the following statements:

During Stage A, a meiosis occurs rapidly in zygote.
During Stage B, the blastula cells migrate and arrange into three layers of embryo cells.
During Stage C, the three embryonic cell layers develop into organs, with the endoderm layer forming the brain and spinal cord.
During Stage D, the tadpole transforms their appearance into mature frog, a process known as organogenesis.

Which statement is correct?

A) 1 and 3 only

B) 2 and 4 only

C) 1 only

D) 2 only

E) 3 only

Question 26

The table below presents the results of antigen and antibody tests conducted on a group of individuals.

Note: ? represents the missing data

According to blood donation and reception guidelines, considering antigens and antibodies in the ABO system, which individuals listed in the table can safely donate blood to someone with type B blood without risk?

A) Individuals P, Q, and R

B) Individuals P, Q, and S

C) Individuals Q, R, and S

D) Individuals R, S, and T

E) Individuals P, R, and T

Question 27

The human immunodeficiency virus (HIV) can be transmitted in body fluid. Some examples of body fluids are listed.

blood
saliva
semen
tear fluid

Which body fluids could transmit HIV?

A) 1 only

B) 3 only

C) 1 and 3 only

D) 1, 2, and 3 only

E) All of them

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